OC-5 Octave
BOSS

The OC-2 can freely mix sounds one octave and two octaves below.
Thanks to BOSS's unique circuit design, the OC-2 retains the overtones and nuances of the original sound, allowing you to obtain an octave effect almost as is.

Electricity confirmation.
It is rarely used.
I don't have a guitar at the moment, so I haven't checked the sound output.
Thank you for your understanding that this is a used item.